Remove every old-style class.

src/plugins/plugin_misc_maildir.py

@@ -56,7 +56,7 @@ MAILDIR_PATH = "Maildir"
 class MaildirError(Exception):
     pass
 
-class MaildirBox():
+class MaildirBox(object):
 
     def __init__(self, host):
         info(_("Plugin Maildir initialization"))
@@ -306,7 +306,7 @@ class MaildirBox():
             pass
 
 
-class MailboxUser:
+class MailboxUser(object):
     """This class is used to access a mailbox"""
 
     def xmppMessage2mail(self, message):